http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60060
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #6)
> (In reply to Dominique d'Humieres from comment #0)
> > warning: invalid DWARF generated by the compiler: DIE 0x000001f0 has
> > multiple AT_calling_convention attributes in
> > '/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccLHCwpM.ltrans0.ltrans.
> > o'.
>
> (In reply to Dominique d'Humieres from comment #5)
> > The ICE is gone with the patch in comment 4 without regression. However on
> > darwin I still get the warnings reported in comment 0.
>
> The calling convention should be (except on sh, cf. sh/sh.c's
> TARGET_DWARF_CALLING_CONVENTION) be always DW_CC_normal - which is not
> emitted as DWARF symbol. The only exception is Fortran's MAIN__ function,
> which is set to DW_CC_program.
>
> I wonder whether you see twice DW_CC_program or some other DW_CC_*. You
> could try readelf to find out which AT_calling_convention are generated.
I see
<1><18c>: Abbrev Number: 3 (DW_TAG_subprogram)
<18d> DW_AT_name : (indirect string, offset: 0x175): mem_nml
<191> DW_AT_decl_file : 1
<192> DW_AT_decl_line : 4
<193> DW_AT_main_subprogram: 1
<193> DW_AT_calling_convention: 2 (program)
<194> DW_AT_inline : 1 (inlined)
<195> DW_AT_main_subprogram: 1
<195> DW_AT_calling_convention: 2 (program)
<196> DW_AT_sibling : <0x50b>
with -O3 -g -flto and
<1><185>: Abbrev Number: 2 (DW_TAG_subprogram)
<186> DW_AT_name : (indirect string, offset: 0x1e0): mem_nml
<18a> DW_AT_decl_file : 1
<18b> DW_AT_decl_line : 4
<18c> DW_AT_main_subprogram: 1
<18c> DW_AT_calling_convention: 2 (program)
<18d> DW_AT_low_pc : 0x400f45
<195> DW_AT_high_pc : 0x15
<19d> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<19f> DW_AT_GNU_all_tail_call_sites: 1
<19f> DW_AT_main_subprogram: 1
<19f> DW_AT_calling_convention: 2 (program)
<1a0> DW_AT_sibling : <0x2a3>
with -g
Looks like a different bug - can you please file it separately as this bug
assigned to me is about LTO issues?
add_calling_convention_attribute is called twice. First via
Breakpoint 5, add_calling_convention_attribute (subr_die=0x7ffff6da1730, decl=
<function_decl 0x7ffff6d7e700 mem_nml>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:16859
16859 enum dwarf_calling_convention value = DW_CC_normal;
Missing separate debuginfos, use: zypper install
glibc-debuginfo-2.18-4.11.1.x86_64 libgmp10-debuginfo-5.1.3-58.2.x86_64
(gdb) bt
#0 add_calling_convention_attribute (subr_die=0x7ffff6da1730,
decl=<function_decl 0x7ffff6d7e700 mem_nml>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:16859
#1 0x00000000008bc477 in gen_subprogram_die (
decl=<function_decl 0x7ffff6d7e700 mem_nml>, context_die=0x7ffff6d71000)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:18535
#2 0x00000000008c1668 in force_decl_die (
decl=<function_decl 0x7ffff6d7e700 mem_nml>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20119
#3 0x00000000008c1581 in get_context_die (
context=<function_decl 0x7ffff6d7e700 mem_nml>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20089
#4 0x00000000008c15e6 in force_decl_die (decl=<var_decl 0x7ffff6d77e40 nxc>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20105
#5 0x00000000008c2fb0 in gen_namelist_decl (
name=<identifier_node 0x7ffff6d7cac8 input>, scope_die=0x7ffff6da1640,
item_decls=<constructor 0x7ffff6d735d0>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20672
#6 0x00000000008c27d0 in gen_decl_die (
decl=<namelist_decl 0x7ffff6c507e8 input>, origin=<tree 0x0>,
context_die=0x7ffff6da1640)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20475
#7 0x00000000008c0d75 in process_scope_var (stmt=<block 0x7ffff6d713c0>,
decl=<namelist_decl 0x7ffff6c507e8 input>, origin=<tree 0x0>,
context_die=0x7ffff6da1640)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:19984
#8 0x00000000008c0df1 in decls_for_scope (stmt=<block 0x7ffff6d713c0>,
context_die=0x7ffff6da1640, depth=0)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20009
#9 0x00000000008bbd94 in gen_subprogram_die (
decl=<function_decl 0x7ffff6d7e800 readnamelist>, context_die=0x0)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:18383
#10 0x00000000008c220a in gen_decl_die (
decl=<function_decl 0x7ffff6d7e800 readnamelist>, origin=<tree 0x0>,
context_die=0x0) at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20376
#11 0x00000000008c345f in dwarf2out_decl (
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20808
#12 0x00000000008c3481 in dwarf2out_function_decl (
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20816
#13 0x000000000092e677 in rest_of_handle_final ()
and once via
Breakpoint 5, add_calling_convention_attribute (subr_die=0x7ffff6da1640,
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:16859
16859 enum dwarf_calling_convention value = DW_CC_normal;
#0 add_calling_convention_attribute (subr_die=0x7ffff6da1640,
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:16859
#1 0x00000000008bc477 in gen_subprogram_die (
decl=<function_decl 0x7ffff6d7e800 readnamelist>, context_die=0x0)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:18535
#2 0x00000000008c220a in gen_decl_die (
decl=<function_decl 0x7ffff6d7e800 readnamelist>, origin=<tree 0x0>,
context_die=0x0) at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20376
#3 0x00000000008c345f in dwarf2out_decl (
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20808
#4 0x00000000008c3481 in dwarf2out_function_decl (
decl=<function_decl 0x7ffff6d7e800 readnamelist>)
at /space/rguenther/src/svn/trunk/gcc/dwarf2out.c:20816
#5 0x000000000092e677 in rest_of_handle_final ()
